Improvement in stump-extractors



A. McKENNEY.

STUMP-EXTRACTOR.

ATTORNEYS.

G Y KMM "PETERS. PKOTO LITHOGRAPHER. WASHING'I'QNv D C.

UNITED STATES PATENT OFFICE ALMERON MCKENNEY, OF EVANSVILLE, WISCONSIN.

IMPROVEMENT IN STUMP-EXTRACTORS.

Specification forming part of Letters Patent No. 188,655, dated March20, 1877 application filed March 3, 1877.

To all whom it may concern:

Be it known that I, ALM'ERON MGKENNEY, of Evansville, in the county ofRock and in the State of Wisconsin, have invented certain new and usefulImprovements in Stump-Puller and Rock-Lifter and do hereby declare thatthe following is a full, clear, and exact de scription thereof,reference being had to the accompanying drawings, and to the letters ofreference marked thereon, making a part of this specification.

My invention relates to stump-pullers and rock-lifters; and it consistsin certain improvements upon Letters Patent Nos. 162,936, and 162,937,granted to me May 4, 187 5, as will be hereinafter more fully set forth.

In order to enable others skilled in the art to which my inventionappertains to make and use the same, I will now proceed to describe itsconstruction and operation, referring to the annexed drawing, in which-Figure 1 is a perspective view of my improved machine. Fig. 2 is anenlarged section of a part thereof; and Figs. 3, 4, and 5 are detailedviews.

In the patents above referred to are shown what is termed adouble-crotch lever and a single-crotch lever.

In the present case I adopt the form of the single-crotch leverwithoutthe axle. and having independent wheels on journal-bearings placedoutside of the levers, and give the lower ends of the two arms of thelever an even bearing with the wheels on the ground, and the fulcrum isplaced near the weight to be raised on the start, to economise thepower.

In the construction of the lever-frame I use two lever-arms, A A, twoand one-fourth inches thick by eight inches wide and eleven feet long.These arms are tapered from the middle on the under edges to four inchesat the upper ends, and they are set two and a half feet apart at thebottom, and tapering upward until they meet at the top.

Between the arms are three cross-girts, B, the lowest one being threefeet from the bottom, and the balance of the space equally divided.

To avoid the difficulty of bending heavy pieces of plank, and to securestrength of the levers below the cross-girts in the unsupported parts ofthe same, and to set the wheels perpendicular, cast-iron flanges G, withrightangle journal-bearings D, and side flanges to set over the edge ofthe levers, are used. To adapt these to their position the outside facesof the levers A are chamt'ered downward in a wedging shape sufficient toset the castings 0 parallel to the face of the wheels E in length equalto the length of the casting. Now, to maintain the strength andthickness of the lever-arms, a wedging-piece, G, of plank of sufficientthickness is placed on the opposite sides with reversed ends, which,with the casting, shall make an even thickness of about three and a halfinches, said inside wedge G extending up far enough to preserve the evensurface, and all are then firmly bolted together.

On the outside, also, each lever-arm A has an additional plank, H,extending from the iron flange upward to about eight inches above thelower cross-girt B, and firmly bolted. This lower oross-girt has twojoint-bolts, a, passing through the levers on the under side of it.

The lever-arms A A are also supported above the doubled part by arib-piece, I, placed edgewise in the middle of the outside of the arms,which rib-pieces are bolted firmly to the same, and are let into theflat pieces H near the lower girt, to break the joints. These pieces Iextend upward to about eighteen inches from the top.

The lower ends of the lever-arms A are rounded to the exact curve of thewheels E, and have an even bearing with them on the plank or shoe, whichis commonly used to keep them from settling into the ground, and saidends and upper edges of the lever-arms are protected with band-iron.

Through each lever, casting, and journal is passed a strong bolt, b,having a broad washer for its support on the inner side of the leverarm,and a cap, J, with a tongue, (1, setting into the end of the journal,and a nut on the end to keep the wheel up to its proper shoulder. Thus,it will be seen that the arms of the lever below the cross-girt are madestiff and strong, to resist the tendency of spreading with the greatpressure downward, and

are strongly supported by the outside pieces H passing upward above thegirt, and by the two strong cross-bolts (1. By means of the ends ot thelevers and the hottoiiis of the Wheels having an even bearing, theweight is in a great measure taken 011' from the journals, nor willthere be too much weight on the wheels alone.

At the top of the lever projects the middle iron platef between the armsof the gripelink h. The outer edge of this plate is rounded for thehearing of the notched har K beloW the connection of the link with saidplate.

This construction is to give the notched bar K chance to rock and tokeep it straight.

Byexperinientl have found that this bar cannot be confined down to astraight surface, but must be free fora rocking motion, and the bearingsmust be in the proper position in re lation to the length of the link,otherwise it will continue to bend until it becomes unfit for use.

The wooden ribs 1, above mentioned, maintain the lever stiff, andprevent any lateral sway when the great weightof all the power to beapplied is suspended from the top by means of the connection of theextension-bar.

A round iron bar, L, is connected to the notched bar K and extendsdownward about half-way to the ground, and has an eye, 6, in the lowerend. The connection of the bars K and L is flexible, as shown.

M is a screw-swivel, with hook k at its upper end to fasten in the eye 6oi the rod L, and at the lower end are links at m to form connectionwith the gra niling-hooks. These are formed of a coiled-wire spring, N,with side arms 0 0 extending downward, and having a gradual enlargementby widening out into a width suflicient to form heavy hooks P P to bedriven into the wood. The arms 0 0 have a link,p, extending around them,resting loosely near the coil and suspended by a small hook, n.

When the hooks P are sprung outward sufficient to allow the points torest against the root or a small stump, and the link p allowed to drop,as the hooks are driven into the wood the link will drop down stillfarther, and thus holding firm by all they gain. The hooks P in somecases may he made double, so as to cover more timber and avoid tearingout.

A hook used in this way need not be confined to a coiled-wire spring,but may be constructed with other kinds of springs.

Asinall hook, x, may suspend the link 19 until it is required for use.

In place of these grappling-hooks a triangle-shaped ring, R, with hook,is connected with the links m. This ring has two chains, S S, suspendedfrom the lower end, it being made broad to admit of them. One of thesechains has a grab-link, s, on the end which serves to connect with theother end around the stump.

These chains are commonly used by passing them downward under a root,and then bringing them up, crossing them and passing them around thestump, and connecting by the grab-link. In this way the chain draws firmaround the stump, and a firm and sure hold is bad on the old or lowstump, and where they cannot be fastened to in any other way.

To hitch under a root separately the root is likely to tear off if it ishard to pull, and to hitch around the stump the chains are alwaysraising, and power is lost.

The chains are intended to be used where great power is required, as thegrapplinghooks would then tear out.

In applying this machine to the use of raising and moving rocks the bedor carrier V is placed low down between the wheels, and yet large wheelsmay be used to move the heavy load, it being firmly bolted to thelever-frame and supported by cross-girts Tand joint-bolts t, making thelever-frame and iron bed a strong supporting-platform.

At the lower end of the bed are screw-eyes v, with which chains W areconnected. These chains are intended to pass down partly under one endor side of the rock, and extend up on the back side, and come togetherin the triangle-ring R. In this the tendency is for the chains to drawtogether. In such case a separate ring, with hook, may be had for thispurpose to connect with the swivel-links; or, the chains S may be usedto extend under the edge of the rock first, and then connect with theeyebolts 22. These eyebolts may be placed at the upper end of theplatform, if desired.

In some cases it is best to cross the chains, either on the front orback side of the rock, in order to have them draw together sutficient tohold small and round rock.

It is usual to hitch the chains so as to give the rock a rolling, lift,and to stop and prop up and take up the slack. It will be seen that atake-up can be had by the notched bar and gripe-link at the top, or bythe screw and swivel in the middle, or by the links at the bottom of theswivel, and also by the grablinks on any common link in the cable-chain.

With these improvements the machine is adapted to a great variety ofsituations for both stump pulling and moving, and rock lifting andmoving.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

1. The lever'arms A A, provided with castings U (3, having projectingjournals D and wheels E, all arranged as described, so that the lowerends of the lever-arms and bottoms of the wheels will have an evenbearing, for the purposes herein set forth.

2. The combination of the V-shaped lever A A, chainfered, as described,to receive the castings U U, the cross-girts B, inside wedgepieces G,outside strengthening'pieces H, ribs 1, and bolts a, substantially asand for the purposes herein set forth.

combination with the swivel M and bars L and K, as and for the purposesherein set forth.

7. The combination, with the lever-arms A A, of the platform V, girts T,cross-bolts t, eyebolts v, and chains W, all as and for the purposesherein set forth.

In testimony that I claim the foregoing I have hereunto set my hand this2d day of March, 1877.

A. MoKEN N EY. Witnesses:

FRANK GALT, HENRY N. MILLER.

